Sierra Metals Inc. (TSX: SMT | OTCQX: SMTSF | BVL: SMT) (“Sierra Metals” or the “Company”) is pleased to report that its Yauricocha mine in Peru has reached a full capacity throughput rate of 3,600 tonnes per day (“tpd”) since the beginning of the fourth quarter. Mine development below the 1120 level was completed on time and on budget and will extend the mine life at Yauricocha.

Ernesto Balarezo, Sierra Metals’ CEO, comments, “Since receiving operating and environmental permits to develop and mine below the 1120 level at Yauricocha earlier in 2024, the team has done a terrific job developing this new zone, and just in seven months has been able to increase the throughput to 3,600 tpd. This was all done on-time, on-budget and most importantly safely.”

Mr. Balarezo continues, “Yauricocha is now operating at full capacity, which is a 30% increase from throughput levels of December 2023. As I have previously stated, the increased capacity and corresponding lower operating costs is a game changer for the mine and for Sierra Metals.”

Qualified Persons

Ricardo Salazar Milla (AIG #8551), Corporate Manager – Mineral Resources, is a Qualified Person (“QP”) as defined under National Instrument NI 43-101 Standards of Disclosure for Mineral Projects. Mr. Salazar has reviewed and approved the scientific and technical content of this news release.

About Sierra Metals

Sierra Metals is a Canadian mining company focused on copper production with additional base and precious metals by-product credits at its Yauricocha Mine in Peru and Bolivar Mine in Mexico. The Company is intent on safely increasing production volume and growing mineral resources. Sierra Metals has recently had several new key discoveries and still has many more exciting brownfield exploration opportunities in Peru and Mexico that are within close proximity to the existing mines. Additionally, the Company has large land packages at each of its mines with several prospective regional targets providing longer-term exploration upside and mineral resource growth potential.

Forward-Looking Statements

This press release contains forward-looking information within the meaning of Canadian securities legislation. Forward-looking information relates to future events or the anticipated performance of Sierra and reflect management's expectations or beliefs regarding such future events and anticipated performance based on an assumed set of economic conditions and courses of action. In certain cases, statements that contain forward-looking information can be identified by the use of words such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", "believes" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might", or "will be taken", "occur" or "be achieved" or the negative of these words or comparable terminology. By its very nature forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual performance of Sierra to be materially different from any anticipated performance expressed or implied by such forward-looking information.

Forward-looking information is subject to a variety of risks and uncertainties, which could cause actual events or results to differ from those reflected in the forward-looking information, including, without limitation, the risks described under the heading "Risk Factors" in the Company's annual information form dated March 15, 2024 for its fiscal year ended December 31, 2023 and other risks identified in the Company's filings with Canadian securities regulators, which are available at www.sedarplus.ca.

The risk factors referred to above are not an exhaustive list of the factors that may affect any of the Company's forward-looking information. Forward-looking information includes statements about the future and is inherently uncertain, and the Company's actual achievements or other future events or conditions may differ materially from those reflected in the forward-looking information due to a variety of risks, uncertainties and other factors. The Company's statements containing forward-looking information are based on the beliefs, expectations, and opinions of management on the date the statements are made, and the Company does not assume any obligation to update such forward-looking information if circumstances or management's beliefs, expectations or opinions should change, other than as required by applicable law. For the reasons set forth above, one should not place undue reliance on forward-looking information.

For further information regarding Sierra Metals, please visit www.sierrametals.com or contact:

Investor Relations Sierra Metals Inc. +1 (866) 721-7437 info@sierrametals.com

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